The Menopause Symptom That Actually Derails Training Isn't the One You Expect

Ask almost anyone what menopause does to an athlete and you will hear about hot flashes. New data from 187 female endurance athletes says something more useful: hot flashes and joint pain occur at almost identical rates — and one of them is roughly three times as likely to disrupt training as the other. It is not the one in the headlines.

A note before we start: this article is about training, not treatment. Nothing here is medical advice, and several of the questions it raises belong to a menopause-literate physician rather than a coach. We will be specific about where that line sits.

The study is Hamilton and colleagues, published in PLOS One in December 2025. It surveyed 187 female endurance athletes aged 40 to 60 — all training at least three days and three hours a week, all with at least five years in their sport. The group was 55% runners, 22% swimmers, 14% cyclists and 9% triathletes, split across premenopausal (18%), perimenopausal (39%) and postmenopausal (43%). Twenty-eight percent were using hormone replacement therapy.

What makes it worth your time is that it asked two questions rather than one. Not just which symptoms do you have, but which ones actually get in the way of your training. Those turn out to be very different lists.

Two Symptoms, Nearly Identical Prevalence, Opposite Consequences

Here is the finding, stated as plainly as it deserves. Among these athletes:

• Hot flashes: 65% reported them. 33% said they negatively affected training.

• Joint and muscular discomfort: 63% reported it. 97% said it negatively affected training.

Same prevalence, within two percentage points. Triple the disruption. Joint and muscular discomfort ranked highest of all twelve symptoms surveyed for negative effect on training, and it ranked highest for performance too, at 91%. Hot flashes ranked tenth of twelve on both measures.

The full picture is worth seeing, because the ordering by disruption looks nothing like the ordering by prevalence:

Symptom	% reporting it	% saying it hurt training	% saying it hurt performance
Joint / muscular discomfort	63%	97%	91%
Sleep problems	88%	92%	89%
Exhaustion	83%	87%	88%
Weight gain	67%	79%	88%
Depressive mood	67%	68%	65%
Anxiety	72%	60%	57%
Bladder problems	52%	54%	44%
Irritability	68%	49%	45%
Heart discomfort	41%	45%	43%
Hot flashes	65%	33%	28%

The survey also asked about vaginal dryness (59% reporting, 14% training impact) and sexual problems (74% reporting — the third most common symptom in the study — but 7% training impact). We have listed them here for completeness rather than leaving a gap in the data; they sit at the bottom of the disruption ranking, which is itself part of the point.

Prevalence and disruption are not the same variable. That is the whole finding, and it is a genuinely useful one, because most of the conversation about menopause and sport has been organized around the wrong column.

Sleep sits high on both lists, which will surprise nobody who has trained through a bad month — and if that is your limiter, our piece on sleep as a performance tool is the more directly useful read. But joint and muscular discomfort is the one that almost nobody is talking about and almost everybody in this age band is reporting as the thing that gets in the way.

Athlete Takeaway: If you are in this age band and training has felt harder, look at joint and muscular discomfort as a training variable rather than a background annoyance. In this sample it was the single most disruptive symptom of the twelve.

Why Joint Pain Gets Filed Under "Getting Older"

Here is what we would guess is happening, and it is the reason this finding matters more than a table of percentages.

Hot flashes announce themselves as menopause. Nobody experiences a hot flash and wonders whether they are simply past it. But a persistent ache in a hip, a knee that grumbles on the back half of a long run, mornings that take longer to loosen — those arrive without a label. And a capable, experienced athlete in her late forties who has been quietly getting a little slower has a ready-made explanation for all of it. She files it under aging, adjusts her expectations downward, and never raises it as a training question at all.

That is the part worth challenging. A symptom that 97% of a surveyed group said was interfering with their training is not a background condition to be absorbed. It is a coaching problem with a coaching response, and it deserves to be treated as one before anyone concludes their best years are behind them.

Worth saying clearly: this study did not ask whether these athletes talked to their coaches about symptoms, or how they modified training. We are not going to imply it measured something it didn't. But the gap between how disruptive this symptom is and how rarely it appears in coaching conversation is wide enough to be worth naming.

Athlete Takeaway: Stop filing joint and muscle ache under "getting older" until load management and strength work have had a real eight to twelve weeks to answer it. Raise it with your coach as a training input, not as an apology.

What We Actually Know About the Mechanism — and What We Don't

This is where we have to be careful, because the popular explanation is tidier than the science.

The story you will hear is a clean causal chain: estrogen falls, tendons and joints suffer, that is your pain. The tissue literature does not deliver that chain cleanly, and in places it points the other way.

A 2019 review in Frontiers in Physiology by Chidi-Ogbolu and Baar states that in tendons and ligaments, estrogen decreases stiffness — and that high estrogen levels can reduce power and increase susceptibility to ligament injury. Hansen and Kjaer's 2016 review reaches a similarly two-sided conclusion: estrogen may support tendon collagen synthesis during regular loading and recovery, yet in young female athletes physiologically high estrogen may raise injury risk through reduced fibrillar crosslinking and greater joint laxity.

Read those together and the simple version does not survive. If estrogen lowers tendon stiffness, then losing estrogen would make tendon stiffer, not weaker. Both directions are argued in print by credible researchers. The honest position is that the mechanism is proposed and actively debated, not established.

What is well described is the phenomenon itself. Menopausal arthralgia is a recognized clinical entity — a 2010 review in Maturitas concluded it is real and experienced by more than half of women around the time of menopause, while flagging the central confound plainly: menopause coincides with rising osteoarthritis incidence, so causation is difficult to establish. In 2024, a narrative review in Climacteric proposed the term "musculoskeletal syndrome of menopause" and estimated that more than 70% of women experience musculoskeletal symptoms. That paper introduces the term; it is not a validated diagnosis, it has no agreed criteria, and no consensus body has adopted it. Treat it as a useful label for a real cluster, not as something you can be diagnosed with.

One more absence worth knowing about: there is no IOC or ACSM consensus statement on menopause in athletes. The governing bodies that have produced careful positions on the female athlete triad, on relative energy deficiency and on injury prevention have not yet addressed this age band. That is not a knock on anyone — it is a description of how new this field is, and a reason to be suspicious of anyone speaking about it with total confidence.

Athlete Takeaway: The symptom is well described; the mechanism is genuinely unsettled. Be skeptical of anyone who explains your joint pain with a single clean causal chain — including us.

Strength and Load Management Are the First Lever

Given all that, what should actually change on Monday?

The most defensible answer is that strength work and load management move to the front of the program rather than the back of it. We want to be precise about the standing of that recommendation, because it is a coaching inference built on adjacent evidence, not a tested treatment.

What the evidence supports directly:

• Resistance training improves bone density in postmenopausal women. A 2025 meta-analysis in the Journal of Orthopaedic Surgery and Research pooled 17 randomized trials and 690 participants, finding standardized mean differences of 0.88 at the lumbar spine and 0.89 at the femoral neck. The authors suggest a regimen at or above 70% of one-rep max, three times a week, sustained over time. They also report significant heterogeneity and describe their own findings as preliminary — 690 participants across 17 trials is about 40 women per study.

• Resistance training improves functional capacity in this population, per a 2022 meta-analysis in Menopause covering 12 trials and 452 participants — though those authors rated their own certainty of evidence as very low to low.

What the evidence does not support: no trial has tested resistance training against joint and muscular discomfort in menopausal endurance athletes. Nobody has run that study. We are reasoning from bone and function outcomes to a symptom outcome, and we would rather say so than dress it up.

That said, it is a reasonable inference, and the practical case is strong. Strength work is the intervention most likely to help, least likely to harm, and most obviously missing from a typical age-group endurance program. If you have been carrying an ache and doing no lifting, that is the first thing to change — and our guide to five essential lifts for every endurance athlete over 40 is a sensible place to begin. If the discomfort is concentrated in your hips or shows up as a running-specific complaint, hip strength is the more targeted starting point.

On load management, the principles are the ordinary ones and they apply with more force here: consistency over heroics, frequency over occasional big sessions, and a genuine willingness to adjust the week when the ache is telling you something. Our piece on what actually declines after 40 — and what you can still train covers the broader picture, and the encouraging news in it holds here too.

Athlete Takeaway: Put two structured strength sessions in the week and hold them for eight to twelve weeks before drawing any conclusions. It is the intervention with the best evidence-to-risk ratio available, even though it has not been tested against this specific symptom.

Three Popular Claims That Outrun the Evidence

This field has more confident advice circulating than it has data, so a few corrections are worth making.

"Menopausal women need more protein than younger athletes." You will see 1.8 to 2.0 g/kg presented as a menopause-specific requirement. The most careful review we found — Moore's 2021 work on protein requirements in masters athletes — concludes there is little evidence that masters athletes' requirements differ from their younger counterparts, and states outright that there has been no research in postmenopausal master female athletes on which to base age- and sex-specific recommendations. The numbers themselves are fine; roughly 1.6 g/kg for resistance-focused athletes and 1.8 g/kg for endurance athletes, spread across four or five meals at 0.3–0.37 g/kg each, is reasonable guidance. It is just not menopause-specific guidance. It is what any endurance athlete should be doing.

"You lose about 10% of your muscle through menopause." This one circulates widely and the real numbers are far smaller. The SWAN study — 1,246 women followed roughly 16 years with DXA, anchored to the final menstrual period, which is the design that actually separates menopause from aging — found lean mass moving from +0.2% per year before the transition to −0.2% per year during it, then no further decline afterward. A separate 2020 study of 234 women puts the total menopause-attributable reduction at 0.5% to 1.5%. SWAN also found fat mass gain accelerating from about 1.0% to 1.7% per year, with no acceleration in overall weight gain — meaning the honest headline is body recomposition, not muscle collapse. And notably, the lean mass decline stopped after the transition, which contradicts the "it only gets worse" framing entirely.

"Midlife women need to lift heavier than everyone else." Partly supported, considerably overstated. The best-supported threshold in the literature is at or above 70% of one-rep max — moderate-to-heavy conventional strength training, not the three-to-five-rep framing that circulates online. And crucially, there is no comparative evidence that midlife women need heavier loading than younger women or than men for the same adaptation. It is a general resistance-training dose-response applied to this population, which is a perfectly good reason to lift properly and a poor reason to believe you need a special program.

One more, for completeness: exercise has not been shown to treat hot flashes. A Cochrane review of five trials and 762 participants found the evidence insufficient. Given where hot flashes actually sit on the disruption table, that matters less than it sounds — but it is worth knowing before anyone sells you a training protocol for it.

Athlete Takeaway: Standard athlete protein guidance and standard progressive strength training are what the evidence supports. You do not need a special protocol — you need the ordinary one, done consistently.

Where a Coach Stops and a Physician Starts

We want to be exact about this, because the line is real and it matters.

A coach's remit here is load, recovery, strength programming and knowing when to refer. That is a genuinely useful remit and it covers a lot of ground.

Outside it: anything to do with hormone replacement therapy. There is a meta-analysis from 2009 covering 23 studies that found a pooled effect of hormone therapy on muscle strength of about 0.23 — roughly 5%, in mostly older non-athlete populations — and essentially nothing beyond that. There is no evidence base at all on HRT and endurance performance in trained women. No randomized trial, no cohort. Anyone telling you it will help or hurt your racing is speculating, and the decision itself involves cardiovascular, breast and clotting risk considerations that have nothing to do with training.

Also outside it: new or one-sided joint pain, which deserves a proper look to rule out inflammatory arthritis, osteoarthritis or thyroid involvement — the study above explicitly did not collect health history, so it cannot tell you what your own ache is. Depressive mood and anxiety were reported by 67% and 72% of this group, and those belong with someone qualified to help. So does bone density assessment, and so does persistent unexplained fatigue.

Find a menopause-literate clinician if you can. The difference between one who is and one who isn't is substantial, and it is worth the effort of looking.

Athlete Takeaway: Bring load, strength and recovery to your coach. Bring HRT, new or asymmetric joint pain, mood and bone density to a menopause-literate physician. Both conversations are worth having.

The Bottom Line

The most useful thing in this research is not a percentage. It is the reordering.

The symptom the culture talks about turns out to be the tenth most disruptive of twelve for these athletes. The symptom almost nobody talks about turns out to be the first — reported by 63% of them and named as interfering with training by 97% of those who had it. If you are a woman between 40 and 60 who has been quietly absorbing joint and muscle ache as evidence that your best racing is behind you, that ordering is worth knowing, and it is worth acting on before you conclude anything.

What to do about it is, encouragingly, not exotic. Structured strength training two days a week at genuine intensity. Load managed with a bit more attention and a bit less ego. Protein at the levels any endurance athlete should be eating. Sleep protected as the training variable it is. None of it requires a special program, and all of it is available to you now.

We will also be straight about the limits of what we have shown you. This was a self-selected sample of 187 US athletes reporting their own perceptions — not measured performance — at one point in time. Women experiencing symptoms are more likely to answer a survey about symptoms, so the prevalence numbers are probably high. What the study is good for is the relative ordering of disruption, and that ordering is striking enough to change how a coach and an athlete should spend their attention.

Women are the fastest-growing group in long-course triathlon, and a large share of them are in exactly this age band — we wrote about what that means for training earlier this year. The sport's research base has not caught up with them yet. Until it does, the least we can do is pay attention to the right symptom.

If this describes your last couple of seasons, we would love to talk it through with you. Building a program around what your body is actually telling you — rather than around what it used to tolerate — is exactly the kind of work a good coaching relationship is for. Set up a call with us now, and we will help you be ready for your best race day!